Apparatus for comminuting pasty and liquid materials



Feb. 15,1927. 1,617,520

H. HORN APPARATUS FOR COMMINUTING PASTY"AND- LIQUID MATERIALS Filed 'June' 5 1926 In van/or:

H H rn Patented Feb. 15, 1927.

oFF cs.

-' fiEIKRIG'E HORN, or FREITAL-DOHLEN, NEAR nnnsnau, GERMANY.

APPARATUS FOR COMMI'NUTING Application and June 5, 1926; swarm.

This invention relates to such apparatus forcomminuting pasty and liquid materials,

more particularly cocoa and chocolate masses, in which inside a pan for holdlng the material and capable of being heated and cooled a centrifugal conveyor rotates,

which causes the 'mass to rotate, sucking it in centrifugal conveyor, so that between them and the walls of the centrifugal conveyor and between the ribs onthe bottom of the conveyor and the bottom of the pan there are narrow gaps, through which the particles of the material are driven at a high speed, which greatly assists the comminution of the material. According to the present invention thebottom of the pan for containing the material, over which the ribs on the bottom of the centrifugal conveyor sweep, is made flat and has a rough surface,

the body of the centrifugal conveyor being also roughened inside and outside. By this arrangement the bottom ofthe pan prevents the layerof material in immediate contact with it from being caused to rotate bytthe centrifugal conveyor and the centrifugal conveyor is rendered more-capable of carrying along'with it the layers of material in immediate contact-with its walls, whereby the particles are thrown with great force against the internal and external strippers and are forced "through the narrow .gaps.

The roughenedbottom of the pan holds the particles back, so that they can be acted on more thoroughly by the ribs at the bot tom of-the centrifugal conveyor and the mutual grinding action is increased. It has been foundv that by this means the comminuting action is very considerably increased an'd accelerated. According to the invention the stripper providedLQn the out-. side of the centrifugal conveyor extends to the ribs on the under side of the conveyor,

which have outwardly .directed extensions following the contour'of the wall of the pan,

without making contact with it, to which ex-- 7 tensionsthere correspond similar lateral ex- 1 tensions of the outer strippers which are at struetional example 0 PAST? 7 AND. LIQUID MATERIALS.

113,942, and in Germany April 1?, 1926.

a short distance above the same. The inner and outer strippers may be located one be-' hind'the other in the direction of rotation of the conveyor and have an angular cross section. They are parallel to a radius of the body of the centrifugal conveyor, so that the sharp edges lying close to the walls of the latter act as very eflicient beating edges. In order-that there shall be a certain amount'jof give between the strippers and the body of the centrifugal conveyor, the

strippers are fixed toa scraper which travels" along the wall of the pan and is rotatable The scraperabout the axis of the conveyor. which travels along the wall of the pan owing to its rotary motion keeps the said wall clean, and allowsthe scrapers to rotate with the centrifugal conveyor continuously at a certain velocity. The arrangement is however capablebfyielding to any\- eater resistance between the centrifuge conveyorv andthe strippers, so that there is no fear of the arrangement being damaged,. even if the strippers and the centrifugal member.

The extensions on the ribs at the under side: of the centrifugal member pass with a slight clearance between the wall of the pan and the extension of the outer scraper and there@ by exert a stron beating action on the particles of material, which come in contact with "them, the efliciency bein thus still further increased and the time ta en for the'op-j eration being decreased.

In the, accompanyin drawing a conthe 'invention is shown, Figure 1 being a vertical axial sec- 1 tion through the apparatus, 3 ing a portion of a centrifugal member to an.

Figure 2 show- Y 7 enlarged scale with the strippers in crosssection and Figure 3 a cross-section-through the lower part of the 'centrifu with the IIbS at the bottom 0 tiflhicll sweep over the roughened bottom of t e an.

a1 member the same,"

. T e pan a has a flatbottom 71. having a-roughened surface. In the pan there rotates the. centrifugal conve or d, the "walls of which are also rouglhene inside and outside. The ribs fat't trifugal member form an. extension of the 108 e bottom of the ceninner conveying ribs e and are bent over 1n the usual manner m the direction of rotation of the centrifugal" member, so as to drawthe material in; In accordance with the present .invention the bottom ribs are hardibodies should get into the gap between 1 i beating edges.

' nal sides of their cross-section para el to rovided with'extensions f, which, as shown 1n Figure 3, may be bent radially and follow the contour of the wall of the pan (Fi of the ribs f. The strippers m and i-are arranged so as to follow one another in the direction of rotation of the centrifugal conveyor (Fig. 2), and have the lon itudithe radius of the centrifugal member so that the edges lying close to the wallsv of the centrifugal ,member provide effective The strippers m and i may be stationary. It is preferable however to make them capable of rotatingand' to provide themwith raking means. kind is formed by a stripper rwhich is connected rigidly to the'stri'ppers mand i and sweeps along the cover and the wall of. the pan keeping them clean. The stripper fr: will 'in most-cases act as asuifi .cient resistance, stripers m and turning with the *centrifuga conveyor. In" exceptional cases a separate braking device may 1 be provided, which acts on the shaft of'the strip ers and the action of which is made regu able." This rotary partof the appara tus can easily yield to greater resistance, 5 caused, for mstance, 1) hard bodies enter centrifugal member, so

, heatin I bottom capable of swee ing over the bottom of'the pan at a small istance from itand mg the gap between t e strippers and the that any serious damage cannot occur.

What I claim is apparatus forcomm v uting pasty liquid materials, comprising in combination a pan having a flat bottom with a f roughened inside surface for the reception of the material to be, treated, means for and. cooling the said pan,v a centrifuga conveying member capa 1e of rotating inthe said pan and having. a roughened inside and outsidejsurface and ribs at its outwardly-directed extensions folwithout touching the same, and strippers lowing --,the .eontour of the wall of the .pan

- name to this specification.

{heating and ilcoolingthe said pan, a cen-' trifugal conveying member capable of rotating in the said pan and having a roughened inside. and outside surface and ribs at its bottom capable of sweeping over the bottom of the pan at a small distance from. it and having outwardly directed extensions following the contour of the wall of the A simple brake of this pan without touching the same, and strippersinside and outside the, centrifugal mem ber arranged one behind the other in the direction of rotation of the centrifugal memberin :close proximity to the walls of the 'same, the said strippers being substantially rectangular in cross section with the longer sides parallel to-a radius of the centrifugal member, the outer-stripperextending as far as the ribs on the'ibottom of the centrifugal member, and having an outwardly di-.

rected lateral extension arranged at a short distance above the extensions on the bottom I'lbS, as andfor the purpose set forth. I

3. An, paratus as claimed in claim2. and in which the inside and outside strippersare capable of being rotated about the axis of thecentrifugalmember and have a stripper (r) fixed to them, capable of's'weep- Hg along e sid of the wall of-the pan, assetforthf 4. An apparatus as claimed in claimj2 Y and in which the inside and outside: strippers arecapable of being rotated about the axis 'of'the centrifugal member and havea strip e'r' (r) fixed to them, capable of sweeping a ong" the inside of the wall of the pan,

HEINRICH HORN.

h s gn-ad nay in combination with means 'for braking the 

